OCB Science Highlights

OCB Science Highlights

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Ocean iron fertilization may amplify pressures on marine biomass with only a limited climate benefit

January 26, 2024

Amidst a heightened focus on the need for both drastic and immediate emissions reductions and carbon dioxide removal to limit warming to 1.5°C (IPCC, 2022), attention is returning to ocean iron fertilization (OIF) as a means of marine carbon dioxide removal (mCDR). First discussed in the early 1990s by John Martin, the concept posits that […]

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Addressing the problem of additionality in ocean alkalinity enhancement

January 26, 2024

The ultimate goal of marine carbon dioxide (CO2) removal (mCDR) is to sequester more atmospheric CO2 in the ocean than the ocean already does today. As such, any mCDR deployment must lead to quantifiably more CO2 sequestration in the ocean than would have happened without the deployment. This requirement is referred to as “additionality.” To […]

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New paper published by OCB Ocean Carbonate System Intercomparison Forum (OCSIF)

January 3, 2024

Carter, B.R., Sharp, J.D., Dickson, A.G., Álvarez, M., Fong, M.B., García-Ibáñez, M.I., Woosley, R.J., Takeshita, Y., Barbero, L., Byrne, R.H., Cai, W.-J., Chierici, M., Clegg, S.L., Easley, R.A., Fassbender, A.J., Fleger, K.L., Li, X., Martín-Mayor, M., Schockman, K.M. and Wang, Z.A. (2023), Uncertainty sources for measurable ocean carbonate chemistry variables. Limnol Oceanogr. https://doi.org/10.1002/lno.12477 Learn more […]

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Fishing Vessel Ocean Observing Network (FVON) reimagines the global data collection paradigm

December 1, 2023

With an increasingly wide variety of technology and innovations, from buoys to satellites, we now understand the open ocea n better than ever. Yet, existing technologies cannot cost-effectively provide accurate, up-to-date data on coastal and shelf ocean environments, especially beneath the surface. These dynamic regions impact billions of people in profound and varied ways. As described […]

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Want to improve the spatiotemporal coverage of coastal water clarity? This approach combines high-resolution satellite data with low-cost in situ methods

December 1, 2023

To maintain marine ecosystem health and human well-being, it is important to understand coastal water quality changes. Water clarity is a key­ component of water quality, which can be measured in situ by tools such as Secchi disks or by satellites with high spatial and temporal coverage. Coastal environments pose unique challenges to remote sensing, […]

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New evidence suggests that tiny zooplankton might be the biggest problem with carbon cycling in IPCC climate models

December 1, 2023

The ocean is the most important sink of anthropogenic emissions and is being considered as a medium to manipulate to draw down even more. Essential in the ocean’s role as a natural carbon-sponge is the net production of organic matter by phytoplankton, some of which sinks and is stored for 100s-1000s of years. Successfully simulating […]

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Size does matter: larger krill leads to more POC export in the West Antarctic Peninsula

December 1, 2023

Despite the importance of particulate organic carbon (POC) export on carbon sequestration and marine ecology, there have been few multi-decade studies in the world’s oceans. A new analysis published in Nature analyzed two decades of POC export data in the West Antarctic Peninsula and found that export oscillates on a 5-year cycle. Using a unique […]

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A suite of CO2 removal approaches modeled for the 1.5 ˚C future

August 31, 2023

Carbon dioxide removal (CDR) is “unavoidable” in efforts to limit end-of-century warming to below 1.5 °C. This is because some greenhouse gas emissions sources—non-CO2 from agriculture, and CO2 from shipping, aviation, and industrial processes—will be difficult to avoid, requiring CDR to offset their climate impacts. Policymakers are interested in a wide variety of ways to draw […]

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Insights into Lagrangian phytoplankton variability from profiling floats

August 31, 2023

Phytoplankton are small, drifting photosynthetic organisms that form the base of marine food webs and play an important role in carbon and nutrient cycling. Analyses of how they vary in space and time (through variables like the concentration of pigment chlorophyll-a, a proxy for their biomass) are therefore important. Because phytoplankton drift with ocean currents, […]

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Net primary production from daily cycles of biomass using Argo floats

August 31, 2023

Net primary productivity is a central metric in ocean biogeochemistry that is costly and time-consuming to estimate using traditional water sampling methods. As a result, it is difficult to detect large-scale trends in ocean productivity. While satellite remote-sensing has partially solved this issue, its observations are limited to the top 10 to 40 m of […]

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